一种腐蚀架空地线张力更换跨越防护装置的设计

A design of crossover protection device for corroded overhead ground wire tension replacement

为提高跨越档腐蚀架空地线张力更换的安全性,避免腐蚀架空地线断线后因回抽坠落摩擦、切割封网绳造成封网绳断裂失效、被跨越设施受损,通过分析封网绳断裂失效原因,设计一种跨越防护装置。张力更换前,在被跨越设施上方布置封网绳的同时,安装多个防护装置,防护装置设计的滑动系统不影响腐蚀架空地线在更换过程中的牵引滑行,可在腐蚀架空地线发生断线后承载其断落冲击荷载,并通过滑动系统对其进行传输,从而避免封网绳直接遭受摩擦、切割而断裂失效,保障被跨越设施的安全。该防护装置经现场实际工程验证,可满足现场使用需求。

In order to improve the safety of the tension replacement of the corroded overhead ground wire in the spanning gear,avoid the failure of the sealing wire rope and make the spanning facility damaged a caused by pulling back,falling,friction,and cutting of the sealing rope after the corroded overhead ground wire is broken.A crossover protection device is designed by analyzing the reasons for the failure of the sealing rope.Before the tension replacement,multiple protective devices are installed while arranging the sealing rope above the facility to be crossed.The sliding system designed by the protective device does not affect the traction and sliding during the replacement of the corroded overhead ground wire.It can bear the impact load of the corroded overhead ground wire after it breaks,and transmit it through the sliding system,so as to prevent the sealing rope from being directly rubbed and cut and broken and fail,and to ensure the safety of the facilities being crossed.The protective device has been verified by the actual engineering on site and can meet the needs of on-site use.